For manufacturers of wind turbine components, TÜV NORD can perform component certification, which would certify the conformity of the relevant component to a chosen standard. The applied procedures as well as the scheme are similar to those within a type certification.
A component certificate can be issued independent to a certain turbine type. Design evaluation is conducted based on design loads. Using loads comparison and other interfaces, the component certification can be implemented into a type certification of the relevant wind turbine on later stage. Most common applications of component certification would be rotor blades, gear boxes or towers.
Advantages:
For component certification, the design loads should cover all possible turbine loads especially those required for component type testing. In case of higher turbine loads, then a new test might be required. Interfaces such as bolted connections to turbine as well as lightning protection system should be taken into consideration.